<!DOCTYPE HTML>
<html reftest-async-scroll>
<body>
  <!-- Test that nested active scrolling elements work -->
  <div style="width:400px; height:500px; overflow:hidden; border:2px solid black"
       reftest-displayport-x="0" reftest-displayport-y="0"
       reftest-displayport-w="800" reftest-displayport-h="2000"
       reftest-async-scroll-x="0" reftest-async-scroll-y="50">
    <div style="width:300px; height:100px; overflow:hidden; border:2px solid blue; margin-top: 100px"
         reftest-displayport-x="0" reftest-displayport-y="0"
         reftest-displayport-w="800" reftest-displayport-h="2000"
         reftest-async-scroll-x="0" reftest-async-scroll-y="0">
      <div style="height:200px; background:purple"></div>
    </div>
    <div class="filler" style="height: 1000px"></div>
  </div>
</html>
